2023/05/04 by Rui Wang, Wang, Rui, Y. G. +9 · 4 citations
Physics and Astronomy · Mathematics · #High-Energy Particle Collisions Research #Statistical Mechanics and Entropy #Stochastic processes and statistical mechanics
paper · pdf · doi:10.48550/arxiv.2305.02988
We develop a kinetic approach to the production of light nuclei up to mass number A \leqslant 4 in intermediate-energy heavy-ion collisions by including them as dynamic degrees of freedom. The conversions between nucleons and light nuclei during the collisions are incorporated dynamically via the breakup of light nuclei by a nucleon and their inverse reactions. We also include the Mott effect on light nuclei, i.e., a light nucleus would no longer be bound if the phase-space density of its surrounding nucleons is too large. With this kinetic approach, we obtain a reasonable description of the measured yields of light nuclei in central Au+Au collisions at energies of 0.25 - 1.0A~\rm GeV by the FOPI collaboration. Our study also indicates that the observed enhancement of the α-particle yield at low incident energies can be attributed to a weaker Mott effect on the α-particle, which makes it more difficult to dissolve in nuclear medium, as a result of its much larger binding energy.